452: aaaaaaaaaaaaaaaaaaaaaa
maybe 7 or more times I have this exception in this day
maybe it's jasper reports... plugin
(I try edit source .jrxml, before work good)

Stacktrace:
java.lang.ClassCastException:
com.sun.java.swing.plaf.windows.WindowsEditorPaneUI cannot be cast to
org.netbeans.editor.BaseTextUI
at org.netbeans.editor.BaseAction.updateComponent(BaseAction.java:483)
at org.netbeans.editor.BaseAction.updateComponent(BaseAction.java:436)
at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:305)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1661)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2879)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2926)